During WWII several murders occur at a convalescent home where Dr. Watson has volunteered his services. He summons Holmes for help and the master detective proceeds to solve the crime from a long list of suspects including the owners of the home, the staff and the patients recovering there.

Basil Rathbone

Sherlock Holmes

Nigel Bruce

Doctor Watson

Dennis Hoey

Inspector Lestrade

Hillary Brooke

Sally Musgrave

Mary Gordon

Mrs. Hudson

Halliwell Hobbes

Alfred Brunton, the butler

Milburn Stone

Capt. Pat Vickery

Minna Phillips

Mrs. Howells

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